Conventional wisdom says defer tax as long as possible — draw the TFSA and non-registered accounts first, leave the RRSP alone until RRIF minimums force your hand. For some retirees that's right. For many Canadians with sizeable RRSPs, it's exactly backwards.
The problem with deferring
Your RRSP isn't just tax-deferred — it's tax-forced. At 71, minimum withdrawals begin, and they're a percentage of a balance that's been compounding for decades. If you under-draw in your 60s:
- The balance grows large.
- The minimums at 71+ become large.
- Those withdrawals land on top of CPP and OAS, pushing you into higher brackets and triggering OAS clawback.
- You've concentrated your taxable income into a few high-tax years instead of spreading it across many low-tax years.
The smoothing alternative
Every year of retirement, you have a "free" tax bracket — the basic personal amount and the lowest federal/provincial brackets — that's largely unused if your only taxable income is a small pension or nothing. Drawing enough from the RRSP to fill those low brackets each year:
- Uses up the cheap tax room every year.
- Shrinks the RRSP balance so later minimums are smaller.
- Smooths taxable income, reducing clawback exposure.
The tool's tax-smoothing target is the taxable income level it fills each year before turning to TFSA/non-reg for the rest of your spending. Set it to roughly the top of a low bracket (the default targets the lowest federal bracket).
When smoothing is less helpful
- Small RRSPs that will be consumed quickly anyway.
- Retirees with large defined-benefit pensions that already fill the low brackets.
- Cases where early RRSP withdrawals would trigger clawback themselves (the target should stay below the clawback threshold).
The takeaway
Tax deferral isn't free — it's a loan from the government that comes due at 71 on terms you don't control. Smoothing reclaims that control. Run the tool with the "Optimize income target" mode on to see the maximum sustainable level spending for your situation, and compare the lifetime tax to a naive drawdown.